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Directory has become more and more important part of Internet technology. Directory exists in a multitude of application ranging from operating systems, asset management systems, security systems, etc. Even more Gartner Group's, a market research firm, predicts that there will 40% to 90% portion of new software and hardware are directory related products at end of 2001 to 2003.
In directory industry field, we can divide products into 3 fields: Directory server, Management system, directory application. Management system is one of important part of directory services. Now directory management system is focus on non web-based system. While directory service applied on Internet services, it is necessary to provide web-based management interface. Web-based management interface will provide advantages of ubiquity, cross platform, thin client, reduce TCO (total cost of ownership).
In this thesis, we design a web-based directory management architecture to provide directory management functions, manage multiple directory servers, and operate with secure features. We implement system using most popular components such as apache web server, PHP script language, SSL protocol so that it can be easy to port to other systems and easy to rebuild.

Chapter 1 Introduction 2
1.1 Research background 1
1.2 Motivation 2
1.3 Thesis Organization 3
Chapter 2 Background Knowledge 4
2.1 LDAP Introduction 4
2.1.1 LDAP: The new common directory 4
2.1.2 Differences between directories and database 4
2.1.3 History and standards 6
2.1.4 LDAP 8
2.2 Public Key Infrastructure (PKI) 15
2.2.1 Encryption /Decryption 15
2.2.2 Certification Authority 16
2.2.3 Secure Socket Layer 17
Chapter 3 Related Works 20
3.1 Client -Server model Directory management 20
3.1.1 Netscape directory server console 22
3.1.2 LDAP Browser/ Editor 22
3.2 Web based Directory Management 23
Chapter 4 Design and Implementation 25
4.1 Design issues 25
4.2 Ubiquitous Resource Services Architecture 25
4.3 Web-based Ubiquitous Resource Services Architecture 28
4.4 Security Mechanism 32
4.5 Implementation 33
4.5.1 System Infrastructure 33
4.5.2 Module design 35
4.5.3 The web-based URSA prototype 36
4.5.4 LDAP server management 39
Chapter 5 Conclusion and Future Works 44
5.1 Conclusion 44
5.2 Future work 44
Appendix Implementation 46
A1 Environment Installation 46
A 1.1 LDAP server installation 46
A 1.2 LDAP Server Configuration 47
A 1.3 Apache web server + SSL +PHP3 installation 54
A2 PHP Language and system pseudo code 59
A2.1 PHP Language 59
A2.2 System pseudo code and flow chart 62
Reference 67

[1] Netscape Communications Corporation "The need for a Directory In Your Application". http://develop.netscape.com/docs/articles/ directory/ whybusinessneeds.htm
[2] Anne C.Lear "The Directory -Enabled Enterprise" IT Pro, July /August 1999 p.p14-17.
[3] Heninz Johner , Larry Brown , Franz-Stefan Hinner ,Wolfgang Reis ,Johan Westman, " Understanding LDAP ,http://www. redbooks.ibm.com
[4] Mark Wilcox , "Implement LDAP", Published by Wrox Press Ltd. ISBN1 -8610002-21-1
[5] James Won-ki Hong, Ji-Young Kong, Tae-Hyoung Yun, and Jong-Seo kim, "Web-Based Intranet Services and Network Management", IEEE Communications Magazine October,1997.
[6] Public-Key Infrastructure (X.509) (pkix) http://www.ietf.org/html. charters/pkix-charter.html
[7] Chu-Sing Yang, Chien-Yuan Liu, Sheng-Wen Bai, Ken-Da Wu, Jr-Houng Chen,Hor-Tzung Lee, and Jr-Houng Wu, "Implement an Ubiquitous Resource Service Architecture Based on the Web an LDAP."TANET 99,Proceedings 1999.
[8] Directory Services Markup Language, http://www.dsml.org
[9] LDAP Browser/ Editor http://www.iit.edu/~gawojar/ldap/
[10] Netscape Directory Server http://developer/netscape.com:80/doc/ manuals/ds_introduction/intro.html
[11] Netscape Directory Gateway http://developer/netscape.com:80/doc/ manuals/dsgw_html/intro.html
[12] LDAP Browser/editor directory manager function http://www.iit.edu/~gawojar/ldap/usage.html#DirectoryManager_functions
[13] Netscape directory server document http://developer.netscape.com/ docs/manuals/index.html?content=directory.html
[14] Apache web server http://www.apache.org/
[15] Open SSL http://www.openssl.org/
[16] Todd Hay "DSML helps directory work together", Network World Fusion , http://www.nwfusion.com/news/tech/1122tech.html
[17] Ldap World http://www.innosoft.com/ldapworld/
[18] Lightweight Directory Access Protocol (V3) RFC 2251
[19] Lightweight Directory Access Protocol (v3):Attribute Syntax Definitions RFC 2252
[20] OpenLdap site http://www.openldap.org/
[21] Making and Installing the OpenLDAP Distribution http://www.openldap.org/software/release/install.html
[22] LDAP implement survey main page http://www.innosoft.com/ldap_ survey/lipn.html
[23] PHP builder web site http://www.phpbuilder.com/getit/
[24] Seong Jin Ahn, Seung Keun Yoo, and Jin Wook Chung," Design and Implementation of a Web-based Internet Performance Management System Using SNMP MIB-2",International Journal of Network Management,1999
[25] Directory Portal of Innosoft company http://www.innosoft.com/press/ directoryportal-pr.html
[26] Web site of Directory Portal http://xtl.innosoft.com:7021/portal/admin